---
product_id: 1290602
title: "Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce"
brand: "royal purple"
price: "€ 20.73"
currency: EUR
in_stock: true
reviews_count: 12
category: "Royal Purple"
url: https://www.desertcart.ie/products/1290602-royal-purple-max-clean-fuel-system-cleaner-and-stabilizer-11722
store_origin: IE
region: Ireland
---

# 2.6% avg horsepower increase 3.2% avg fuel economy boost Up to 18% emission reduction Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce

**Brand:** royal purple
**Price:** € 20.73
**Availability:** ✅ In Stock

## Summary

> ⛽⚡ Clean fuel, fierce drive, greener planet.

## Quick Answers

- **What is this?** Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce by royal purple
- **How much does it cost?** € 20.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/1290602-royal-purple-max-clean-fuel-system-cleaner-and-stabilizer-11722)

## Best For

- royal purple enthusiasts

## Why This Product

- Trusted royal purple brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Horsepower on Demand:** Feel a noticeable 2.6% horsepower surge with every drive
- • **Universal Compatibility:** Works seamlessly with gasoline, diesel, ethanol blends & biofuels—future-proof your ride
- • **Eco-Friendly Performance:** Slash hydrocarbon, NOx & CO emissions by up to 18%—drive cleaner, drive smarter
- • **Fuel Economy Game-Changer:** Unlock an average 3.2% MPG gain and save at the pump
- • **Triple-Action Power Boost:** Cleans injectors, valves & combustion chambers for peak engine health

## Overview

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer is a premium 3-in-1 additive designed to restore and enhance engine performance by cleaning fuel injectors, carburetors, intake valves, and combustion chambers. It improves fuel economy by an average of 3.2%, increases horsepower by 2.6%, and reduces harmful emissions by up to 18%. Compatible with gasoline, diesel, ethanol blends, and biofuels, Max-Clean is EPA and CARB compliant, making it the smart choice for millennial professionals seeking efficient, eco-conscious vehicle maintenance.

## Description

Royal Purple Max-Clean is a state-of-the-art high performance fuel system cleaner that maximizes the performance of your fuel system. Max-Clean restores fuel economy by deeply penetrating deposits and cleaning injectors, carburetors, intake valves and combustion chambers. Royal Purple Max-Clean is EPA / CARB Compliant. Recommended for use in gasoline and diesel engines and can be used with all ethanol blends or biofuel. Max-Clean can be used in both 4-cycle & 2-cycle engines and will not harm vehicle emissions equipment.

Review: GREAT PRODUCT - WORKS GREAT, I PUT IT IN WITH 1/42TANK LEFT DROVE IT AROUND TILL 1/4 TANK FILLED IT UP GAINED 2 MPG
Review: Very good Fuel treatment for cleaning your car’s valves, fuel injectors etc. from carbon buildup. - Excellent fuel treatment to clean carbon buildup off the Valves and Cylinder heads. Highly recommended by professionals in video comparisons. This won 2nd place but does almost as well as the 1st place product that required several steps. I am happy with it. Made my 2024 Honda CR-V and wife’s 2013 Honda Accord run and idle better. Son also claimed his 2019 Ford Fusion was helped also.

## Features

- 3-in-1 fuel additive keeps new engines clean and improves vehicle's performance
- Improves fuel economy an average of 3.2 percent
- Increases horsepower an average of 2.6 percent
- Reduces hydrocarbon, NOx and CO emissions (on average 12, 13 and 18-percent respectively)
- Fit type: Vehicle Specific

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00B1VBQRS |
| Best Sellers Rank | #663 in Automotive ( See Top 100 in Automotive ) #6 in Fuel System Cleaners |
| Brand | Royal Purple |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,863) |
| Date First Available | January 16, 2013 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.25 pounds |
| Item model number | 11722 |
| Manufacturer | Royal Purple |
| Manufacturer Part Number | 11722 |
| Model | 11722 |
| OEM Part Number | 11722 |
| Product Dimensions | 2.63 x 2.63 x 9.73 inches |

## Images

![Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce - Image 1](https://m.media-amazon.com/images/I/7178Kyc-yJL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: my tank holds 33 gallons, would i have to fill it up only will 20 gallons after i pour in Max Clean or could i fill right up?**
A: Put in a bottle & fill your tank 3/4 of the way up.  That way you get the improved performance, but only have to buy one bottle.  That's what I do as I have a 26 gallon tank.

**Q: How to use this ? Can I just put this to the fuel tank ?**
A: Dump it in the fuel tank and fill it up with gas. This large can will treat up to 20 Gallons. I use it in my motorcycle, so I just put a small amount in. It also has a fuel stabilizer in it which is good cause I don't ride the bike that often.

**Q: Does this work in small gas engines?**
A: What do u mean by small gas engines? Im running a 1500cc engine and works well with it. Is this small enough?

**Q: Does MaxClean come with the application funnel for capless fuel tanks like some of their other products?**
A: It does come with a plastic funnel that attaches to the bottle. Depends what fuel your vehicle takes if it will work or not if it's a caplesss filler neck vehicle tho.

## Customer Reviews

### ⭐⭐⭐⭐⭐ GREAT PRODUCT
*by M***U on January 18, 2026*

WORKS GREAT, I PUT IT IN WITH 1/42TANK LEFT DROVE IT AROUND TILL 1/4 TANK FILLED IT UP GAINED 2 MPG

### ⭐⭐⭐⭐⭐ Very good Fuel treatment for cleaning your car’s valves, fuel injectors etc. from carbon buildup.
*by G***. on November 20, 2025*

Excellent fuel treatment to clean carbon buildup off the Valves and Cylinder heads. Highly recommended by professionals in video comparisons. This won 2nd place but does almost as well as the 1st place product that required several steps. I am happy with it. Made my 2024 Honda CR-V and wife’s 2013 Honda Accord run and idle better. Son also claimed his 2019 Ford Fusion was helped also.

### ⭐⭐⭐⭐⭐ Instant gratification
*by H***S on September 7, 2023*

I recently used the Royal Purple Max-Clean Fuel System Cleaner and Stabilizer (11722) in my vehicle, and I'm thoroughly impressed with the results. First and foremost, this product is easy to use. The 20-ounce bottle is convenient and provides enough treatment for several applications. Adding it to my fuel tank was a simple task, and it mixed effortlessly with the gasoline. One of the standout features of Max-Clean is its effectiveness in cleaning the fuel system. After using it, I noticed a significant improvement in engine performance. My vehicle's acceleration became smoother, and there was a noticeable reduction in engine noise. It's clear that this product helps remove deposits and carbon buildup, optimizing fuel combustion. Additionally, Max-Clean acts as a stabilizer, which is particularly valuable if you have a vehicle that sits idle for extended periods or if you want to improve fuel quality in areas with inconsistent gasoline formulations. It helps prevent fuel system corrosion and keeps the fuel fresh, which can lead to better overall engine health. I appreciate that Max-Clean is suitable for use in both gasoline and diesel engines, making it a versatile choice for a wide range of vehicles. While it's not the cheapest fuel system cleaner on the market, the results it delivers are worth the investment. Improved fuel efficiency, smoother engine performance, and long-term fuel system protection make Royal Purple Max-Clean Fuel System Cleaner and Stabilizer a product I would highly recommend to anyone looking to maintain their vehicle's performance and reliability.

## Frequently Bought Together

- Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce
- Royal Purple 18000 Max Atomizer Fuel Injector Cleaner, 6 fl. oz.
- Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-24*